Canvas Print DPI Calculator
Type in your photo's pixel dimensions and a print size — get the effective DPI, crop loss, and the biggest size you can safely print. No upload needed.
Your Image in Pixels
Width (pixels)
Height (pixels)
Where to find pixel dimensions
- Windows: right-click the file → Properties → Details
- Mac: select the file and press Cmd+I (Get Info)
- iPhone / Android: open the photo → swipe up or tap ⓘ
Have the actual file to hand? Upload it to the Image Quality Checker for an exact answer, including embedded DPI metadata.
Desired Print Size
Width (inches)
Height (inches)
Enter your image's pixel dimensions to calculate
What Size Can You Print? Quick Reference
Maximum recommended print sizes for common camera and phone resolutions, keeping the image's native aspect ratio.
| Camera / Source | Pixels | Max canvas @ 100 DPI | Max photo print @ 150 DPI |
|---|---|---|---|
| Older phone / 8 MP | 3264 × 2448 | 32" × 24" | 21" × 16" |
| iPhone / 12 MP | 4032 × 3024 | 40" × 30" | 26" × 20" |
| Mirrorless / 24 MP | 6000 × 4000 | 60" × 40" | 40" × 26" |
| Pro camera / 45 MP | 8192 × 5464 | 81" × 54" | 54" × 36" |
| WhatsApp-compressed photo | 1600 × 1200 | 16" × 12" | 10" × 8" |
Canvas hides minor softness, so 100 DPI is a safe canvas minimum; glossy or lustre photo paper shows more detail and needs 150-300 DPI.
Checking every order by hand?
CanvasPrep runs this exact quality check on every incoming order automatically — flagging low DPI, generating branded comparison proofs for your customers, and suggesting better sizes before anything reaches the press.
How the DPI Calculator Works
DPI (dots per inch) is simply your image's pixels divided by the print size in inches. A 4032-pixel-wide photo printed 40 inches wide gives about 100 DPI. But the naive division is misleading whenever the image and the print have different aspect ratios: part of the image gets cropped away to fit, and only the remaining pixels count. This calculator does it properly — it works out the crop first, then calculates the effective DPI from the pixels that actually make it onto the print.
As a rule of thumb, canvas prints look sharp from about 100-150 DPI because the woven texture hides minor softness, while glossy and lustre photo papers want 150-300 DPI. If your effective DPI comes out below the minimum, the calculator shows the largest size the image can safely support and suggests standard sizes that fit your photo better.
Frequently Asked Questions
What DPI do I need for a canvas print?
100 DPI is a safe minimum for stretched canvas — the textured surface hides minor softness, and canvases are usually viewed from a metre or more away. For large statement pieces viewed from across a room, even 75-80 DPI can look acceptable.
Is 72 DPI good enough for printing?
Usually not for close viewing. 72 DPI shows visible softness on photo paper at arm's length. On canvas, viewed from a distance, it can pass for very large wall art — but if you can choose, aim for 100 DPI or more.
Why is my effective DPI lower than pixels ÷ inches?
Because of cropping. If your photo's aspect ratio (say 4:3) doesn't match the print's (say 2:3), the sides or the top and bottom get trimmed to fit. The trimmed pixels can't contribute to sharpness, so the effective DPI is calculated only from the pixels that remain.
Can I increase the DPI of my photo?
Upscaling software can add pixels, but it cannot add real detail — results vary from decent to artificial-looking. The reliable options are printing at a smaller size, choosing canvas over glossy paper, or going back to the original, uncompressed photo (email and messaging apps often shrink images dramatically).